package arduino;


import java.io.InputStream;
import java.io.OutputStream;
import gnu.io.CommPortIdentifier; 
import gnu.io.SerialPort;
import gnu.io.SerialPortEvent; 
import gnu.io.SerialPortEventListener; 
import java.util.Enumeration;

public class SerialTest implements SerialPortEventListener {

	SerialPort serialPort;
	StringBuffer inputStreamString;
    /** The port we're normally going to use. */
	private static final String PORT_NAMES[] = { 
			//"/dev/tty.usbserial-A9007UX1", // Mac OS X
			//"/dev/ttyUSB0", // Linux
			//"COM1",
			//"COM2",
			//"COM3", // Windows
			//"COM4"
			"/dev/tty.usbmodem411", // Mac OS X
			};
	
	/** Buffered input stream from the port */
	private InputStream input;
	/** The output stream to the port */
	private OutputStream output;
	/** Milliseconds to block while waiting for port open */
	private static final int TIME_OUT = 2000;
	/** Default bits per second for COM port. */
	private static final int DATA_RATE = 9600;

	//private ApplicationFrame myApp;

	// this queue holds all messages before processing
	private MessageQueue 	msgQueue;
	// this length determines the time interval
	// before message processing is fired
	//private long messageInterval ;

	StringBuffer singleMessage ;
	
	public void initialize(MessageQueue msgq) {
		CommPortIdentifier portId = null;
		Enumeration portEnum = CommPortIdentifier.getPortIdentifiers();
	
		// iterate through, looking for the port
		while (portEnum.hasMoreElements()) {			
			CommPortIdentifier currPortId = (CommPortIdentifier) portEnum.nextElement();
			System.out.println("portname: "+currPortId.getName());
			for (String portName : PORT_NAMES) {
				if (currPortId.getName().equals(portName)) {
					portId = currPortId;
					break;
				}
			}
		}

		if (portId == null) {
			System.out.println("Could not find COM port.");
			return;
		}

		try {
			// open serial port, and use class name for the appName.
			serialPort = (SerialPort) portId.open(this.getClass().getName(),
					TIME_OUT);

			// set port parameters
			serialPort.setSerialPortParams(DATA_RATE,
					SerialPort.DATABITS_8,
					SerialPort.STOPBITS_1,
					SerialPort.PARITY_NONE);

			// open the streams
			input = serialPort.getInputStream();
			//output = serialPort.getOutputStream();

			// add event listeners
			serialPort.addEventListener(this);
			serialPort.notifyOnDataAvailable(true);
		} catch (Exception e) {
			System.err.println(e.toString());
		}
		//save the pointer to the main application
		//myApp = app;
		inputStreamString = new StringBuffer("");
		msgQueue = msgq ;
		//messageInterval = 200 ;
		
		singleMessage = new StringBuffer();
	}
	
	/**
	 * This should be called when you stop using the port.
	 * This will prevent port locking on platforms like Linux.
	 */
	public synchronized void close() {
		if (serialPort != null) {
			serialPort.removeEventListener();
			serialPort.close();
		}
	}

	/**
	 * Handle an event on the serial port. Read the data and print it.
	 */
	public synchronized void serialEvent(SerialPortEvent oEvent) {
		if (oEvent.getEventType() == SerialPortEvent.DATA_AVAILABLE) {
			try {
				int available = input.available();				
				byte chunk[] = new byte[available];
				input.read(chunk, 0, available);
				//System.out.println("BA = "+available);
				inputStreamString.append(new String(chunk));
				// look in the chunk for 'E'
				for( int i = 0 ; i < inputStreamString.length(); i++){
					singleMessage.append(inputStreamString.charAt(i));
					if( inputStreamString.charAt(i) == 'E'){												
						//delete the message from the inputstream	
						//inputStreamString.delete(0, i+1);						
						//System.out.println("Message is "+new String(singleMessage));						
						// construct a PressureMessage and insert it into Message queue
						int sourceID = -1;
						if( singleMessage.charAt(0) == 'U'){
							sourceID = 0 ; // pressure sensor1
						}
						else if(singleMessage.charAt(0) == 'D'){
							sourceID = 1 ; // pressure sensor2
						}
						else if(singleMessage.charAt(0) == 'L'){
							sourceID = 2; // light sensor
						}
						else if(singleMessage.charAt(0) == 'T'){
							sourceID = 4; // light sensor
						}
						 
						singleMessage.deleteCharAt(singleMessage.length()-1);		// delete message start
						singleMessage.deleteCharAt(0);						// and end signal
						//long messageTime = System.currentTimeMillis() ;
						MyMessage pmsg = new MyMessage(sourceID,new String(singleMessage));
						//clear the single message
						singleMessage.delete(0, singleMessage.length());
						msgQueue.InsertMessage(pmsg) ;										
						//myApp.mySerialEventListeners(message);
					}
					else if(inputStreamString.charAt(i) == 'F'){
						MyMessage pmsg = new MyMessage(3, new String(singleMessage));
						//clear the single message
						singleMessage.delete(0, singleMessage.length());
						msgQueue.InsertMessage(pmsg) ;																
					}
				}				
				inputStreamString.delete(0, inputStreamString.length());
			} catch (Exception e) {
				System.err.println(e.toString());
			}
		}
		// Ignore all the other eventTypes, but you should consider the other ones.
	}
	

	//public static void main(String[] args) throws Exception {
	//	SerialTest main = new SerialTest();
	//	main.initialize();
	//	System.out.println("Started");
	//}
}


